The question arises, of what does this knowledge of life's battle consist? It comprises the knowledge of warfare, how to fight and how to make peace. Human nature very often makes the mistake of taking sides, either the side of war or the side of peace. But if one studies the history of nations and races one will find that it was this mistake which often caused their failure. There have been times when nations and races have developed in their character the knowledge of peace, for instance people such as the Hindus with their most ancient civilization; but it could not bring them complete satisfaction as one side of human nature was neglected and misunderstood.